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Commit | Line | Data |
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1 | /* | |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | * Copyright (C) Johannes Schindelin, 2005 | |
6 | * | |
7 | */ | |
8 | #include "cache.h" | |
9 | #include "exec_cmd.h" | |
10 | ||
11 | #define MAXNAME (256) | |
12 | ||
13 | static FILE *config_file; | |
14 | static const char *config_file_name; | |
15 | static int config_linenr; | |
16 | static int config_file_eof; | |
17 | static int zlib_compression_seen; | |
18 | ||
19 | const char *config_exclusive_filename = NULL; | |
20 | ||
21 | static int get_next_char(void) | |
22 | { | |
23 | int c; | |
24 | FILE *f; | |
25 | ||
26 | c = '\n'; | |
27 | if ((f = config_file) != NULL) { | |
28 | c = fgetc(f); | |
29 | if (c == '\r') { | |
30 | /* DOS like systems */ | |
31 | c = fgetc(f); | |
32 | if (c != '\n') { | |
33 | ungetc(c, f); | |
34 | c = '\r'; | |
35 | } | |
36 | } | |
37 | if (c == '\n') | |
38 | config_linenr++; | |
39 | if (c == EOF) { | |
40 | config_file_eof = 1; | |
41 | c = '\n'; | |
42 | } | |
43 | } | |
44 | return c; | |
45 | } | |
46 | ||
47 | static char *parse_value(void) | |
48 | { | |
49 | static char value[1024]; | |
50 | int quote = 0, comment = 0, len = 0, space = 0; | |
51 | ||
52 | for (;;) { | |
53 | int c = get_next_char(); | |
54 | if (len >= sizeof(value) - 1) | |
55 | return NULL; | |
56 | if (c == '\n') { | |
57 | if (quote) | |
58 | return NULL; | |
59 | value[len] = 0; | |
60 | return value; | |
61 | } | |
62 | if (comment) | |
63 | continue; | |
64 | if (isspace(c) && !quote) { | |
65 | space = 1; | |
66 | continue; | |
67 | } | |
68 | if (!quote) { | |
69 | if (c == ';' || c == '#') { | |
70 | comment = 1; | |
71 | continue; | |
72 | } | |
73 | } | |
74 | if (space) { | |
75 | if (len) | |
76 | value[len++] = ' '; | |
77 | space = 0; | |
78 | } | |
79 | if (c == '\\') { | |
80 | c = get_next_char(); | |
81 | switch (c) { | |
82 | case '\n': | |
83 | continue; | |
84 | case 't': | |
85 | c = '\t'; | |
86 | break; | |
87 | case 'b': | |
88 | c = '\b'; | |
89 | break; | |
90 | case 'n': | |
91 | c = '\n'; | |
92 | break; | |
93 | /* Some characters escape as themselves */ | |
94 | case '\\': case '"': | |
95 | break; | |
96 | /* Reject unknown escape sequences */ | |
97 | default: | |
98 | return NULL; | |
99 | } | |
100 | value[len++] = c; | |
101 | continue; | |
102 | } | |
103 | if (c == '"') { | |
104 | quote = 1-quote; | |
105 | continue; | |
106 | } | |
107 | value[len++] = c; | |
108 | } | |
109 | } | |
110 | ||
111 | static inline int iskeychar(int c) | |
112 | { | |
113 | return isalnum(c) || c == '-'; | |
114 | } | |
115 | ||
116 | static int get_value(config_fn_t fn, void *data, char *name, unsigned int len) | |
117 | { | |
118 | int c; | |
119 | char *value; | |
120 | ||
121 | /* Get the full name */ | |
122 | for (;;) { | |
123 | c = get_next_char(); | |
124 | if (config_file_eof) | |
125 | break; | |
126 | if (!iskeychar(c)) | |
127 | break; | |
128 | name[len++] = tolower(c); | |
129 | if (len >= MAXNAME) | |
130 | return -1; | |
131 | } | |
132 | name[len] = 0; | |
133 | while (c == ' ' || c == '\t') | |
134 | c = get_next_char(); | |
135 | ||
136 | value = NULL; | |
137 | if (c != '\n') { | |
138 | if (c != '=') | |
139 | return -1; | |
140 | value = parse_value(); | |
141 | if (!value) | |
142 | return -1; | |
143 | } | |
144 | return fn(name, value, data); | |
145 | } | |
146 | ||
147 | static int get_extended_base_var(char *name, int baselen, int c) | |
148 | { | |
149 | do { | |
150 | if (c == '\n') | |
151 | return -1; | |
152 | c = get_next_char(); | |
153 | } while (isspace(c)); | |
154 | ||
155 | /* We require the format to be '[base "extension"]' */ | |
156 | if (c != '"') | |
157 | return -1; | |
158 | name[baselen++] = '.'; | |
159 | ||
160 | for (;;) { | |
161 | int c = get_next_char(); | |
162 | if (c == '\n') | |
163 | return -1; | |
164 | if (c == '"') | |
165 | break; | |
166 | if (c == '\\') { | |
167 | c = get_next_char(); | |
168 | if (c == '\n') | |
169 | return -1; | |
170 | } | |
171 | name[baselen++] = c; | |
172 | if (baselen > MAXNAME / 2) | |
173 | return -1; | |
174 | } | |
175 | ||
176 | /* Final ']' */ | |
177 | if (get_next_char() != ']') | |
178 | return -1; | |
179 | return baselen; | |
180 | } | |
181 | ||
182 | static int get_base_var(char *name) | |
183 | { | |
184 | int baselen = 0; | |
185 | ||
186 | for (;;) { | |
187 | int c = get_next_char(); | |
188 | if (config_file_eof) | |
189 | return -1; | |
190 | if (c == ']') | |
191 | return baselen; | |
192 | if (isspace(c)) | |
193 | return get_extended_base_var(name, baselen, c); | |
194 | if (!iskeychar(c) && c != '.') | |
195 | return -1; | |
196 | if (baselen > MAXNAME / 2) | |
197 | return -1; | |
198 | name[baselen++] = tolower(c); | |
199 | } | |
200 | } | |
201 | ||
202 | static int git_parse_file(config_fn_t fn, void *data) | |
203 | { | |
204 | int comment = 0; | |
205 | int baselen = 0; | |
206 | static char var[MAXNAME]; | |
207 | ||
208 | /* U+FEFF Byte Order Mark in UTF8 */ | |
209 | static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf"; | |
210 | const unsigned char *bomptr = utf8_bom; | |
211 | ||
212 | for (;;) { | |
213 | int c = get_next_char(); | |
214 | if (bomptr && *bomptr) { | |
215 | /* We are at the file beginning; skip UTF8-encoded BOM | |
216 | * if present. Sane editors won't put this in on their | |
217 | * own, but e.g. Windows Notepad will do it happily. */ | |
218 | if ((unsigned char) c == *bomptr) { | |
219 | bomptr++; | |
220 | continue; | |
221 | } else { | |
222 | /* Do not tolerate partial BOM. */ | |
223 | if (bomptr != utf8_bom) | |
224 | break; | |
225 | /* No BOM at file beginning. Cool. */ | |
226 | bomptr = NULL; | |
227 | } | |
228 | } | |
229 | if (c == '\n') { | |
230 | if (config_file_eof) | |
231 | return 0; | |
232 | comment = 0; | |
233 | continue; | |
234 | } | |
235 | if (comment || isspace(c)) | |
236 | continue; | |
237 | if (c == '#' || c == ';') { | |
238 | comment = 1; | |
239 | continue; | |
240 | } | |
241 | if (c == '[') { | |
242 | baselen = get_base_var(var); | |
243 | if (baselen <= 0) | |
244 | break; | |
245 | var[baselen++] = '.'; | |
246 | var[baselen] = 0; | |
247 | continue; | |
248 | } | |
249 | if (!isalpha(c)) | |
250 | break; | |
251 | var[baselen] = tolower(c); | |
252 | if (get_value(fn, data, var, baselen+1) < 0) | |
253 | break; | |
254 | } | |
255 | die("bad config file line %d in %s", config_linenr, config_file_name); | |
256 | } | |
257 | ||
258 | static int parse_unit_factor(const char *end, unsigned long *val) | |
259 | { | |
260 | if (!*end) | |
261 | return 1; | |
262 | else if (!strcasecmp(end, "k")) { | |
263 | *val *= 1024; | |
264 | return 1; | |
265 | } | |
266 | else if (!strcasecmp(end, "m")) { | |
267 | *val *= 1024 * 1024; | |
268 | return 1; | |
269 | } | |
270 | else if (!strcasecmp(end, "g")) { | |
271 | *val *= 1024 * 1024 * 1024; | |
272 | return 1; | |
273 | } | |
274 | return 0; | |
275 | } | |
276 | ||
277 | static int git_parse_long(const char *value, long *ret) | |
278 | { | |
279 | if (value && *value) { | |
280 | char *end; | |
281 | long val = strtol(value, &end, 0); | |
282 | unsigned long factor = 1; | |
283 | if (!parse_unit_factor(end, &factor)) | |
284 | return 0; | |
285 | *ret = val * factor; | |
286 | return 1; | |
287 | } | |
288 | return 0; | |
289 | } | |
290 | ||
291 | int git_parse_ulong(const char *value, unsigned long *ret) | |
292 | { | |
293 | if (value && *value) { | |
294 | char *end; | |
295 | unsigned long val = strtoul(value, &end, 0); | |
296 | if (!parse_unit_factor(end, &val)) | |
297 | return 0; | |
298 | *ret = val; | |
299 | return 1; | |
300 | } | |
301 | return 0; | |
302 | } | |
303 | ||
304 | static void die_bad_config(const char *name) | |
305 | { | |
306 | if (config_file_name) | |
307 | die("bad config value for '%s' in %s", name, config_file_name); | |
308 | die("bad config value for '%s'", name); | |
309 | } | |
310 | ||
311 | int git_config_int(const char *name, const char *value) | |
312 | { | |
313 | long ret = 0; | |
314 | if (!git_parse_long(value, &ret)) | |
315 | die_bad_config(name); | |
316 | return ret; | |
317 | } | |
318 | ||
319 | unsigned long git_config_ulong(const char *name, const char *value) | |
320 | { | |
321 | unsigned long ret; | |
322 | if (!git_parse_ulong(value, &ret)) | |
323 | die_bad_config(name); | |
324 | return ret; | |
325 | } | |
326 | ||
327 | int git_config_bool_or_int(const char *name, const char *value, int *is_bool) | |
328 | { | |
329 | *is_bool = 1; | |
330 | if (!value) | |
331 | return 1; | |
332 | if (!*value) | |
333 | return 0; | |
334 | if (!strcasecmp(value, "true") || !strcasecmp(value, "yes") || !strcasecmp(value, "on")) | |
335 | return 1; | |
336 | if (!strcasecmp(value, "false") || !strcasecmp(value, "no") || !strcasecmp(value, "off")) | |
337 | return 0; | |
338 | *is_bool = 0; | |
339 | return git_config_int(name, value); | |
340 | } | |
341 | ||
342 | int git_config_bool(const char *name, const char *value) | |
343 | { | |
344 | int discard; | |
345 | return !!git_config_bool_or_int(name, value, &discard); | |
346 | } | |
347 | ||
348 | int git_config_string(const char **dest, const char *var, const char *value) | |
349 | { | |
350 | if (!value) | |
351 | return config_error_nonbool(var); | |
352 | *dest = xstrdup(value); | |
353 | return 0; | |
354 | } | |
355 | ||
356 | static int git_default_core_config(const char *var, const char *value) | |
357 | { | |
358 | /* This needs a better name */ | |
359 | if (!strcmp(var, "core.filemode")) { | |
360 | trust_executable_bit = git_config_bool(var, value); | |
361 | return 0; | |
362 | } | |
363 | if (!strcmp(var, "core.trustctime")) { | |
364 | trust_ctime = git_config_bool(var, value); | |
365 | return 0; | |
366 | } | |
367 | ||
368 | if (!strcmp(var, "core.quotepath")) { | |
369 | quote_path_fully = git_config_bool(var, value); | |
370 | return 0; | |
371 | } | |
372 | ||
373 | if (!strcmp(var, "core.symlinks")) { | |
374 | has_symlinks = git_config_bool(var, value); | |
375 | return 0; | |
376 | } | |
377 | ||
378 | if (!strcmp(var, "core.ignorecase")) { | |
379 | ignore_case = git_config_bool(var, value); | |
380 | return 0; | |
381 | } | |
382 | ||
383 | if (!strcmp(var, "core.bare")) { | |
384 | is_bare_repository_cfg = git_config_bool(var, value); | |
385 | return 0; | |
386 | } | |
387 | ||
388 | if (!strcmp(var, "core.ignorestat")) { | |
389 | assume_unchanged = git_config_bool(var, value); | |
390 | return 0; | |
391 | } | |
392 | ||
393 | if (!strcmp(var, "core.prefersymlinkrefs")) { | |
394 | prefer_symlink_refs = git_config_bool(var, value); | |
395 | return 0; | |
396 | } | |
397 | ||
398 | if (!strcmp(var, "core.logallrefupdates")) { | |
399 | log_all_ref_updates = git_config_bool(var, value); | |
400 | return 0; | |
401 | } | |
402 | ||
403 | if (!strcmp(var, "core.warnambiguousrefs")) { | |
404 | warn_ambiguous_refs = git_config_bool(var, value); | |
405 | return 0; | |
406 | } | |
407 | ||
408 | if (!strcmp(var, "core.loosecompression")) { | |
409 | int level = git_config_int(var, value); | |
410 | if (level == -1) | |
411 | level = Z_DEFAULT_COMPRESSION; | |
412 | else if (level < 0 || level > Z_BEST_COMPRESSION) | |
413 | die("bad zlib compression level %d", level); | |
414 | zlib_compression_level = level; | |
415 | zlib_compression_seen = 1; | |
416 | return 0; | |
417 | } | |
418 | ||
419 | if (!strcmp(var, "core.compression")) { | |
420 | int level = git_config_int(var, value); | |
421 | if (level == -1) | |
422 | level = Z_DEFAULT_COMPRESSION; | |
423 | else if (level < 0 || level > Z_BEST_COMPRESSION) | |
424 | die("bad zlib compression level %d", level); | |
425 | core_compression_level = level; | |
426 | core_compression_seen = 1; | |
427 | if (!zlib_compression_seen) | |
428 | zlib_compression_level = level; | |
429 | return 0; | |
430 | } | |
431 | ||
432 | if (!strcmp(var, "core.packedgitwindowsize")) { | |
433 | int pgsz_x2 = getpagesize() * 2; | |
434 | packed_git_window_size = git_config_int(var, value); | |
435 | ||
436 | /* This value must be multiple of (pagesize * 2) */ | |
437 | packed_git_window_size /= pgsz_x2; | |
438 | if (packed_git_window_size < 1) | |
439 | packed_git_window_size = 1; | |
440 | packed_git_window_size *= pgsz_x2; | |
441 | return 0; | |
442 | } | |
443 | ||
444 | if (!strcmp(var, "core.packedgitlimit")) { | |
445 | packed_git_limit = git_config_int(var, value); | |
446 | return 0; | |
447 | } | |
448 | ||
449 | if (!strcmp(var, "core.deltabasecachelimit")) { | |
450 | delta_base_cache_limit = git_config_int(var, value); | |
451 | return 0; | |
452 | } | |
453 | ||
454 | if (!strcmp(var, "core.autocrlf")) { | |
455 | if (value && !strcasecmp(value, "input")) { | |
456 | auto_crlf = -1; | |
457 | return 0; | |
458 | } | |
459 | auto_crlf = git_config_bool(var, value); | |
460 | return 0; | |
461 | } | |
462 | ||
463 | if (!strcmp(var, "core.safecrlf")) { | |
464 | if (value && !strcasecmp(value, "warn")) { | |
465 | safe_crlf = SAFE_CRLF_WARN; | |
466 | return 0; | |
467 | } | |
468 | safe_crlf = git_config_bool(var, value); | |
469 | return 0; | |
470 | } | |
471 | ||
472 | if (!strcmp(var, "core.pager")) | |
473 | return git_config_string(&pager_program, var, value); | |
474 | ||
475 | if (!strcmp(var, "core.editor")) | |
476 | return git_config_string(&editor_program, var, value); | |
477 | ||
478 | if (!strcmp(var, "core.excludesfile")) | |
479 | return git_config_string(&excludes_file, var, value); | |
480 | ||
481 | if (!strcmp(var, "core.whitespace")) { | |
482 | if (!value) | |
483 | return config_error_nonbool(var); | |
484 | whitespace_rule_cfg = parse_whitespace_rule(value); | |
485 | return 0; | |
486 | } | |
487 | ||
488 | if (!strcmp(var, "core.fsyncobjectfiles")) { | |
489 | fsync_object_files = git_config_bool(var, value); | |
490 | return 0; | |
491 | } | |
492 | ||
493 | if (!strcmp(var, "core.preloadindex")) { | |
494 | core_preload_index = git_config_bool(var, value); | |
495 | return 0; | |
496 | } | |
497 | ||
498 | if (!strcmp(var, "core.createobject")) { | |
499 | if (!strcmp(value, "rename")) | |
500 | object_creation_mode = OBJECT_CREATION_USES_RENAMES; | |
501 | else if (!strcmp(value, "link")) | |
502 | object_creation_mode = OBJECT_CREATION_USES_HARDLINKS; | |
503 | else | |
504 | die("Invalid mode for object creation: %s", value); | |
505 | return 0; | |
506 | } | |
507 | ||
508 | /* Add other config variables here and to Documentation/config.txt. */ | |
509 | return 0; | |
510 | } | |
511 | ||
512 | static int git_default_user_config(const char *var, const char *value) | |
513 | { | |
514 | if (!strcmp(var, "user.name")) { | |
515 | if (!value) | |
516 | return config_error_nonbool(var); | |
517 | strlcpy(git_default_name, value, sizeof(git_default_name)); | |
518 | if (git_default_email[0]) | |
519 | user_ident_explicitly_given = 1; | |
520 | return 0; | |
521 | } | |
522 | ||
523 | if (!strcmp(var, "user.email")) { | |
524 | if (!value) | |
525 | return config_error_nonbool(var); | |
526 | strlcpy(git_default_email, value, sizeof(git_default_email)); | |
527 | if (git_default_name[0]) | |
528 | user_ident_explicitly_given = 1; | |
529 | return 0; | |
530 | } | |
531 | ||
532 | /* Add other config variables here and to Documentation/config.txt. */ | |
533 | return 0; | |
534 | } | |
535 | ||
536 | static int git_default_i18n_config(const char *var, const char *value) | |
537 | { | |
538 | if (!strcmp(var, "i18n.commitencoding")) | |
539 | return git_config_string(&git_commit_encoding, var, value); | |
540 | ||
541 | if (!strcmp(var, "i18n.logoutputencoding")) | |
542 | return git_config_string(&git_log_output_encoding, var, value); | |
543 | ||
544 | /* Add other config variables here and to Documentation/config.txt. */ | |
545 | return 0; | |
546 | } | |
547 | ||
548 | static int git_default_branch_config(const char *var, const char *value) | |
549 | { | |
550 | if (!strcmp(var, "branch.autosetupmerge")) { | |
551 | if (value && !strcasecmp(value, "always")) { | |
552 | git_branch_track = BRANCH_TRACK_ALWAYS; | |
553 | return 0; | |
554 | } | |
555 | git_branch_track = git_config_bool(var, value); | |
556 | return 0; | |
557 | } | |
558 | if (!strcmp(var, "branch.autosetuprebase")) { | |
559 | if (!value) | |
560 | return config_error_nonbool(var); | |
561 | else if (!strcmp(value, "never")) | |
562 | autorebase = AUTOREBASE_NEVER; | |
563 | else if (!strcmp(value, "local")) | |
564 | autorebase = AUTOREBASE_LOCAL; | |
565 | else if (!strcmp(value, "remote")) | |
566 | autorebase = AUTOREBASE_REMOTE; | |
567 | else if (!strcmp(value, "always")) | |
568 | autorebase = AUTOREBASE_ALWAYS; | |
569 | else | |
570 | return error("Malformed value for %s", var); | |
571 | return 0; | |
572 | } | |
573 | ||
574 | /* Add other config variables here and to Documentation/config.txt. */ | |
575 | return 0; | |
576 | } | |
577 | ||
578 | static int git_default_push_config(const char *var, const char *value) | |
579 | { | |
580 | if (!strcmp(var, "push.default")) { | |
581 | if (!value) | |
582 | return config_error_nonbool(var); | |
583 | else if (!strcmp(value, "nothing")) | |
584 | push_default = PUSH_DEFAULT_NOTHING; | |
585 | else if (!strcmp(value, "matching")) | |
586 | push_default = PUSH_DEFAULT_MATCHING; | |
587 | else if (!strcmp(value, "tracking")) | |
588 | push_default = PUSH_DEFAULT_TRACKING; | |
589 | else if (!strcmp(value, "current")) | |
590 | push_default = PUSH_DEFAULT_CURRENT; | |
591 | else { | |
592 | error("Malformed value for %s: %s", var, value); | |
593 | return error("Must be one of nothing, matching, " | |
594 | "tracking or current."); | |
595 | } | |
596 | return 0; | |
597 | } | |
598 | ||
599 | /* Add other config variables here and to Documentation/config.txt. */ | |
600 | return 0; | |
601 | } | |
602 | ||
603 | static int git_default_mailmap_config(const char *var, const char *value) | |
604 | { | |
605 | if (!strcmp(var, "mailmap.file")) | |
606 | return git_config_string(&git_mailmap_file, var, value); | |
607 | ||
608 | /* Add other config variables here and to Documentation/config.txt. */ | |
609 | return 0; | |
610 | } | |
611 | ||
612 | int git_default_config(const char *var, const char *value, void *dummy) | |
613 | { | |
614 | if (!prefixcmp(var, "core.")) | |
615 | return git_default_core_config(var, value); | |
616 | ||
617 | if (!prefixcmp(var, "user.")) | |
618 | return git_default_user_config(var, value); | |
619 | ||
620 | if (!prefixcmp(var, "i18n.")) | |
621 | return git_default_i18n_config(var, value); | |
622 | ||
623 | if (!prefixcmp(var, "branch.")) | |
624 | return git_default_branch_config(var, value); | |
625 | ||
626 | if (!prefixcmp(var, "push.")) | |
627 | return git_default_push_config(var, value); | |
628 | ||
629 | if (!prefixcmp(var, "mailmap.")) | |
630 | return git_default_mailmap_config(var, value); | |
631 | ||
632 | if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) { | |
633 | pager_use_color = git_config_bool(var,value); | |
634 | return 0; | |
635 | } | |
636 | ||
637 | /* Add other config variables here and to Documentation/config.txt. */ | |
638 | return 0; | |
639 | } | |
640 | ||
641 | int git_config_from_file(config_fn_t fn, const char *filename, void *data) | |
642 | { | |
643 | int ret; | |
644 | FILE *f = fopen(filename, "r"); | |
645 | ||
646 | ret = -1; | |
647 | if (f) { | |
648 | config_file = f; | |
649 | config_file_name = filename; | |
650 | config_linenr = 1; | |
651 | config_file_eof = 0; | |
652 | ret = git_parse_file(fn, data); | |
653 | fclose(f); | |
654 | config_file_name = NULL; | |
655 | } | |
656 | return ret; | |
657 | } | |
658 | ||
659 | const char *git_etc_gitconfig(void) | |
660 | { | |
661 | static const char *system_wide; | |
662 | if (!system_wide) | |
663 | system_wide = system_path(ETC_GITCONFIG); | |
664 | return system_wide; | |
665 | } | |
666 | ||
667 | static int git_env_bool(const char *k, int def) | |
668 | { | |
669 | const char *v = getenv(k); | |
670 | return v ? git_config_bool(k, v) : def; | |
671 | } | |
672 | ||
673 | int git_config_system(void) | |
674 | { | |
675 | return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0); | |
676 | } | |
677 | ||
678 | int git_config_global(void) | |
679 | { | |
680 | return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0); | |
681 | } | |
682 | ||
683 | int git_config(config_fn_t fn, void *data) | |
684 | { | |
685 | int ret = 0, found = 0; | |
686 | char *repo_config = NULL; | |
687 | const char *home = NULL; | |
688 | ||
689 | /* Setting $GIT_CONFIG makes git read _only_ the given config file. */ | |
690 | if (config_exclusive_filename) | |
691 | return git_config_from_file(fn, config_exclusive_filename, data); | |
692 | if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) { | |
693 | ret += git_config_from_file(fn, git_etc_gitconfig(), | |
694 | data); | |
695 | found += 1; | |
696 | } | |
697 | ||
698 | home = getenv("HOME"); | |
699 | if (git_config_global() && home) { | |
700 | char *user_config = xstrdup(mkpath("%s/.gitconfig", home)); | |
701 | if (!access(user_config, R_OK)) { | |
702 | ret += git_config_from_file(fn, user_config, data); | |
703 | found += 1; | |
704 | } | |
705 | free(user_config); | |
706 | } | |
707 | ||
708 | repo_config = git_pathdup("config"); | |
709 | if (!access(repo_config, R_OK)) { | |
710 | ret += git_config_from_file(fn, repo_config, data); | |
711 | found += 1; | |
712 | } | |
713 | free(repo_config); | |
714 | if (found == 0) | |
715 | return -1; | |
716 | return ret; | |
717 | } | |
718 | ||
719 | /* | |
720 | * Find all the stuff for git_config_set() below. | |
721 | */ | |
722 | ||
723 | #define MAX_MATCHES 512 | |
724 | ||
725 | static struct { | |
726 | int baselen; | |
727 | char *key; | |
728 | int do_not_match; | |
729 | regex_t *value_regex; | |
730 | int multi_replace; | |
731 | size_t offset[MAX_MATCHES]; | |
732 | enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state; | |
733 | int seen; | |
734 | } store; | |
735 | ||
736 | static int matches(const char *key, const char *value) | |
737 | { | |
738 | return !strcmp(key, store.key) && | |
739 | (store.value_regex == NULL || | |
740 | (store.do_not_match ^ | |
741 | !regexec(store.value_regex, value, 0, NULL, 0))); | |
742 | } | |
743 | ||
744 | static int store_aux(const char *key, const char *value, void *cb) | |
745 | { | |
746 | const char *ep; | |
747 | size_t section_len; | |
748 | ||
749 | switch (store.state) { | |
750 | case KEY_SEEN: | |
751 | if (matches(key, value)) { | |
752 | if (store.seen == 1 && store.multi_replace == 0) { | |
753 | warning("%s has multiple values", key); | |
754 | } else if (store.seen >= MAX_MATCHES) { | |
755 | error("too many matches for %s", key); | |
756 | return 1; | |
757 | } | |
758 | ||
759 | store.offset[store.seen] = ftell(config_file); | |
760 | store.seen++; | |
761 | } | |
762 | break; | |
763 | case SECTION_SEEN: | |
764 | /* | |
765 | * What we are looking for is in store.key (both | |
766 | * section and var), and its section part is baselen | |
767 | * long. We found key (again, both section and var). | |
768 | * We would want to know if this key is in the same | |
769 | * section as what we are looking for. We already | |
770 | * know we are in the same section as what should | |
771 | * hold store.key. | |
772 | */ | |
773 | ep = strrchr(key, '.'); | |
774 | section_len = ep - key; | |
775 | ||
776 | if ((section_len != store.baselen) || | |
777 | memcmp(key, store.key, section_len+1)) { | |
778 | store.state = SECTION_END_SEEN; | |
779 | break; | |
780 | } | |
781 | ||
782 | /* | |
783 | * Do not increment matches: this is no match, but we | |
784 | * just made sure we are in the desired section. | |
785 | */ | |
786 | store.offset[store.seen] = ftell(config_file); | |
787 | /* fallthru */ | |
788 | case SECTION_END_SEEN: | |
789 | case START: | |
790 | if (matches(key, value)) { | |
791 | store.offset[store.seen] = ftell(config_file); | |
792 | store.state = KEY_SEEN; | |
793 | store.seen++; | |
794 | } else { | |
795 | if (strrchr(key, '.') - key == store.baselen && | |
796 | !strncmp(key, store.key, store.baselen)) { | |
797 | store.state = SECTION_SEEN; | |
798 | store.offset[store.seen] = ftell(config_file); | |
799 | } | |
800 | } | |
801 | } | |
802 | return 0; | |
803 | } | |
804 | ||
805 | static int write_error(const char *filename) | |
806 | { | |
807 | error("failed to write new configuration file %s", filename); | |
808 | ||
809 | /* Same error code as "failed to rename". */ | |
810 | return 4; | |
811 | } | |
812 | ||
813 | static int store_write_section(int fd, const char *key) | |
814 | { | |
815 | const char *dot; | |
816 | int i, success; | |
817 | struct strbuf sb = STRBUF_INIT; | |
818 | ||
819 | dot = memchr(key, '.', store.baselen); | |
820 | if (dot) { | |
821 | strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key); | |
822 | for (i = dot - key + 1; i < store.baselen; i++) { | |
823 | if (key[i] == '"' || key[i] == '\\') | |
824 | strbuf_addch(&sb, '\\'); | |
825 | strbuf_addch(&sb, key[i]); | |
826 | } | |
827 | strbuf_addstr(&sb, "\"]\n"); | |
828 | } else { | |
829 | strbuf_addf(&sb, "[%.*s]\n", store.baselen, key); | |
830 | } | |
831 | ||
832 | success = write_in_full(fd, sb.buf, sb.len) == sb.len; | |
833 | strbuf_release(&sb); | |
834 | ||
835 | return success; | |
836 | } | |
837 | ||
838 | static int store_write_pair(int fd, const char *key, const char *value) | |
839 | { | |
840 | int i, success; | |
841 | int length = strlen(key + store.baselen + 1); | |
842 | const char *quote = ""; | |
843 | struct strbuf sb = STRBUF_INIT; | |
844 | ||
845 | /* | |
846 | * Check to see if the value needs to be surrounded with a dq pair. | |
847 | * Note that problematic characters are always backslash-quoted; this | |
848 | * check is about not losing leading or trailing SP and strings that | |
849 | * follow beginning-of-comment characters (i.e. ';' and '#') by the | |
850 | * configuration parser. | |
851 | */ | |
852 | if (value[0] == ' ') | |
853 | quote = "\""; | |
854 | for (i = 0; value[i]; i++) | |
855 | if (value[i] == ';' || value[i] == '#') | |
856 | quote = "\""; | |
857 | if (i && value[i - 1] == ' ') | |
858 | quote = "\""; | |
859 | ||
860 | strbuf_addf(&sb, "\t%.*s = %s", | |
861 | length, key + store.baselen + 1, quote); | |
862 | ||
863 | for (i = 0; value[i]; i++) | |
864 | switch (value[i]) { | |
865 | case '\n': | |
866 | strbuf_addstr(&sb, "\\n"); | |
867 | break; | |
868 | case '\t': | |
869 | strbuf_addstr(&sb, "\\t"); | |
870 | break; | |
871 | case '"': | |
872 | case '\\': | |
873 | strbuf_addch(&sb, '\\'); | |
874 | default: | |
875 | strbuf_addch(&sb, value[i]); | |
876 | break; | |
877 | } | |
878 | strbuf_addf(&sb, "%s\n", quote); | |
879 | ||
880 | success = write_in_full(fd, sb.buf, sb.len) == sb.len; | |
881 | strbuf_release(&sb); | |
882 | ||
883 | return success; | |
884 | } | |
885 | ||
886 | static ssize_t find_beginning_of_line(const char *contents, size_t size, | |
887 | size_t offset_, int *found_bracket) | |
888 | { | |
889 | size_t equal_offset = size, bracket_offset = size; | |
890 | ssize_t offset; | |
891 | ||
892 | contline: | |
893 | for (offset = offset_-2; offset > 0 | |
894 | && contents[offset] != '\n'; offset--) | |
895 | switch (contents[offset]) { | |
896 | case '=': equal_offset = offset; break; | |
897 | case ']': bracket_offset = offset; break; | |
898 | } | |
899 | if (offset > 0 && contents[offset-1] == '\\') { | |
900 | offset_ = offset; | |
901 | goto contline; | |
902 | } | |
903 | if (bracket_offset < equal_offset) { | |
904 | *found_bracket = 1; | |
905 | offset = bracket_offset+1; | |
906 | } else | |
907 | offset++; | |
908 | ||
909 | return offset; | |
910 | } | |
911 | ||
912 | int git_config_set(const char *key, const char *value) | |
913 | { | |
914 | return git_config_set_multivar(key, value, NULL, 0); | |
915 | } | |
916 | ||
917 | /* | |
918 | * If value==NULL, unset in (remove from) config, | |
919 | * if value_regex!=NULL, disregard key/value pairs where value does not match. | |
920 | * if multi_replace==0, nothing, or only one matching key/value is replaced, | |
921 | * else all matching key/values (regardless how many) are removed, | |
922 | * before the new pair is written. | |
923 | * | |
924 | * Returns 0 on success. | |
925 | * | |
926 | * This function does this: | |
927 | * | |
928 | * - it locks the config file by creating ".git/config.lock" | |
929 | * | |
930 | * - it then parses the config using store_aux() as validator to find | |
931 | * the position on the key/value pair to replace. If it is to be unset, | |
932 | * it must be found exactly once. | |
933 | * | |
934 | * - the config file is mmap()ed and the part before the match (if any) is | |
935 | * written to the lock file, then the changed part and the rest. | |
936 | * | |
937 | * - the config file is removed and the lock file rename()d to it. | |
938 | * | |
939 | */ | |
940 | int git_config_set_multivar(const char *key, const char *value, | |
941 | const char *value_regex, int multi_replace) | |
942 | { | |
943 | int i, dot; | |
944 | int fd = -1, in_fd; | |
945 | int ret; | |
946 | char *config_filename; | |
947 | struct lock_file *lock = NULL; | |
948 | const char *last_dot = strrchr(key, '.'); | |
949 | ||
950 | if (config_exclusive_filename) | |
951 | config_filename = xstrdup(config_exclusive_filename); | |
952 | else | |
953 | config_filename = git_pathdup("config"); | |
954 | ||
955 | /* | |
956 | * Since "key" actually contains the section name and the real | |
957 | * key name separated by a dot, we have to know where the dot is. | |
958 | */ | |
959 | ||
960 | if (last_dot == NULL) { | |
961 | error("key does not contain a section: %s", key); | |
962 | ret = 2; | |
963 | goto out_free; | |
964 | } | |
965 | store.baselen = last_dot - key; | |
966 | ||
967 | store.multi_replace = multi_replace; | |
968 | ||
969 | /* | |
970 | * Validate the key and while at it, lower case it for matching. | |
971 | */ | |
972 | store.key = xmalloc(strlen(key) + 1); | |
973 | dot = 0; | |
974 | for (i = 0; key[i]; i++) { | |
975 | unsigned char c = key[i]; | |
976 | if (c == '.') | |
977 | dot = 1; | |
978 | /* Leave the extended basename untouched.. */ | |
979 | if (!dot || i > store.baselen) { | |
980 | if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) { | |
981 | error("invalid key: %s", key); | |
982 | free(store.key); | |
983 | ret = 1; | |
984 | goto out_free; | |
985 | } | |
986 | c = tolower(c); | |
987 | } else if (c == '\n') { | |
988 | error("invalid key (newline): %s", key); | |
989 | free(store.key); | |
990 | ret = 1; | |
991 | goto out_free; | |
992 | } | |
993 | store.key[i] = c; | |
994 | } | |
995 | store.key[i] = 0; | |
996 | ||
997 | /* | |
998 | * The lock serves a purpose in addition to locking: the new | |
999 | * contents of .git/config will be written into it. | |
1000 | */ | |
1001 | lock = xcalloc(sizeof(struct lock_file), 1); | |
1002 | fd = hold_lock_file_for_update(lock, config_filename, 0); | |
1003 | if (fd < 0) { | |
1004 | error("could not lock config file %s: %s", config_filename, strerror(errno)); | |
1005 | free(store.key); | |
1006 | ret = -1; | |
1007 | goto out_free; | |
1008 | } | |
1009 | ||
1010 | /* | |
1011 | * If .git/config does not exist yet, write a minimal version. | |
1012 | */ | |
1013 | in_fd = open(config_filename, O_RDONLY); | |
1014 | if ( in_fd < 0 ) { | |
1015 | free(store.key); | |
1016 | ||
1017 | if ( ENOENT != errno ) { | |
1018 | error("opening %s: %s", config_filename, | |
1019 | strerror(errno)); | |
1020 | ret = 3; /* same as "invalid config file" */ | |
1021 | goto out_free; | |
1022 | } | |
1023 | /* if nothing to unset, error out */ | |
1024 | if (value == NULL) { | |
1025 | ret = 5; | |
1026 | goto out_free; | |
1027 | } | |
1028 | ||
1029 | store.key = (char *)key; | |
1030 | if (!store_write_section(fd, key) || | |
1031 | !store_write_pair(fd, key, value)) | |
1032 | goto write_err_out; | |
1033 | } else { | |
1034 | struct stat st; | |
1035 | char *contents; | |
1036 | size_t contents_sz, copy_begin, copy_end; | |
1037 | int i, new_line = 0; | |
1038 | ||
1039 | if (value_regex == NULL) | |
1040 | store.value_regex = NULL; | |
1041 | else { | |
1042 | if (value_regex[0] == '!') { | |
1043 | store.do_not_match = 1; | |
1044 | value_regex++; | |
1045 | } else | |
1046 | store.do_not_match = 0; | |
1047 | ||
1048 | store.value_regex = (regex_t*)xmalloc(sizeof(regex_t)); | |
1049 | if (regcomp(store.value_regex, value_regex, | |
1050 | REG_EXTENDED)) { | |
1051 | error("invalid pattern: %s", value_regex); | |
1052 | free(store.value_regex); | |
1053 | ret = 6; | |
1054 | goto out_free; | |
1055 | } | |
1056 | } | |
1057 | ||
1058 | store.offset[0] = 0; | |
1059 | store.state = START; | |
1060 | store.seen = 0; | |
1061 | ||
1062 | /* | |
1063 | * After this, store.offset will contain the *end* offset | |
1064 | * of the last match, or remain at 0 if no match was found. | |
1065 | * As a side effect, we make sure to transform only a valid | |
1066 | * existing config file. | |
1067 | */ | |
1068 | if (git_config_from_file(store_aux, config_filename, NULL)) { | |
1069 | error("invalid config file %s", config_filename); | |
1070 | free(store.key); | |
1071 | if (store.value_regex != NULL) { | |
1072 | regfree(store.value_regex); | |
1073 | free(store.value_regex); | |
1074 | } | |
1075 | ret = 3; | |
1076 | goto out_free; | |
1077 | } | |
1078 | ||
1079 | free(store.key); | |
1080 | if (store.value_regex != NULL) { | |
1081 | regfree(store.value_regex); | |
1082 | free(store.value_regex); | |
1083 | } | |
1084 | ||
1085 | /* if nothing to unset, or too many matches, error out */ | |
1086 | if ((store.seen == 0 && value == NULL) || | |
1087 | (store.seen > 1 && multi_replace == 0)) { | |
1088 | ret = 5; | |
1089 | goto out_free; | |
1090 | } | |
1091 | ||
1092 | fstat(in_fd, &st); | |
1093 | contents_sz = xsize_t(st.st_size); | |
1094 | contents = xmmap(NULL, contents_sz, PROT_READ, | |
1095 | MAP_PRIVATE, in_fd, 0); | |
1096 | close(in_fd); | |
1097 | ||
1098 | if (store.seen == 0) | |
1099 | store.seen = 1; | |
1100 | ||
1101 | for (i = 0, copy_begin = 0; i < store.seen; i++) { | |
1102 | if (store.offset[i] == 0) { | |
1103 | store.offset[i] = copy_end = contents_sz; | |
1104 | } else if (store.state != KEY_SEEN) { | |
1105 | copy_end = store.offset[i]; | |
1106 | } else | |
1107 | copy_end = find_beginning_of_line( | |
1108 | contents, contents_sz, | |
1109 | store.offset[i]-2, &new_line); | |
1110 | ||
1111 | if (copy_end > 0 && contents[copy_end-1] != '\n') | |
1112 | new_line = 1; | |
1113 | ||
1114 | /* write the first part of the config */ | |
1115 | if (copy_end > copy_begin) { | |
1116 | if (write_in_full(fd, contents + copy_begin, | |
1117 | copy_end - copy_begin) < | |
1118 | copy_end - copy_begin) | |
1119 | goto write_err_out; | |
1120 | if (new_line && | |
1121 | write_in_full(fd, "\n", 1) != 1) | |
1122 | goto write_err_out; | |
1123 | } | |
1124 | copy_begin = store.offset[i]; | |
1125 | } | |
1126 | ||
1127 | /* write the pair (value == NULL means unset) */ | |
1128 | if (value != NULL) { | |
1129 | if (store.state == START) { | |
1130 | if (!store_write_section(fd, key)) | |
1131 | goto write_err_out; | |
1132 | } | |
1133 | if (!store_write_pair(fd, key, value)) | |
1134 | goto write_err_out; | |
1135 | } | |
1136 | ||
1137 | /* write the rest of the config */ | |
1138 | if (copy_begin < contents_sz) | |
1139 | if (write_in_full(fd, contents + copy_begin, | |
1140 | contents_sz - copy_begin) < | |
1141 | contents_sz - copy_begin) | |
1142 | goto write_err_out; | |
1143 | ||
1144 | munmap(contents, contents_sz); | |
1145 | } | |
1146 | ||
1147 | if (commit_lock_file(lock) < 0) { | |
1148 | error("could not commit config file %s", config_filename); | |
1149 | ret = 4; | |
1150 | goto out_free; | |
1151 | } | |
1152 | ||
1153 | /* | |
1154 | * lock is committed, so don't try to roll it back below. | |
1155 | * NOTE: Since lockfile.c keeps a linked list of all created | |
1156 | * lock_file structures, it isn't safe to free(lock). It's | |
1157 | * better to just leave it hanging around. | |
1158 | */ | |
1159 | lock = NULL; | |
1160 | ret = 0; | |
1161 | ||
1162 | out_free: | |
1163 | if (lock) | |
1164 | rollback_lock_file(lock); | |
1165 | free(config_filename); | |
1166 | return ret; | |
1167 | ||
1168 | write_err_out: | |
1169 | ret = write_error(lock->filename); | |
1170 | goto out_free; | |
1171 | ||
1172 | } | |
1173 | ||
1174 | static int section_name_match (const char *buf, const char *name) | |
1175 | { | |
1176 | int i = 0, j = 0, dot = 0; | |
1177 | for (; buf[i] && buf[i] != ']'; i++) { | |
1178 | if (!dot && isspace(buf[i])) { | |
1179 | dot = 1; | |
1180 | if (name[j++] != '.') | |
1181 | break; | |
1182 | for (i++; isspace(buf[i]); i++) | |
1183 | ; /* do nothing */ | |
1184 | if (buf[i] != '"') | |
1185 | break; | |
1186 | continue; | |
1187 | } | |
1188 | if (buf[i] == '\\' && dot) | |
1189 | i++; | |
1190 | else if (buf[i] == '"' && dot) { | |
1191 | for (i++; isspace(buf[i]); i++) | |
1192 | ; /* do_nothing */ | |
1193 | break; | |
1194 | } | |
1195 | if (buf[i] != name[j++]) | |
1196 | break; | |
1197 | } | |
1198 | return (buf[i] == ']' && name[j] == 0); | |
1199 | } | |
1200 | ||
1201 | /* if new_name == NULL, the section is removed instead */ | |
1202 | int git_config_rename_section(const char *old_name, const char *new_name) | |
1203 | { | |
1204 | int ret = 0, remove = 0; | |
1205 | char *config_filename; | |
1206 | struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1); | |
1207 | int out_fd; | |
1208 | char buf[1024]; | |
1209 | ||
1210 | if (config_exclusive_filename) | |
1211 | config_filename = xstrdup(config_exclusive_filename); | |
1212 | else | |
1213 | config_filename = git_pathdup("config"); | |
1214 | out_fd = hold_lock_file_for_update(lock, config_filename, 0); | |
1215 | if (out_fd < 0) { | |
1216 | ret = error("could not lock config file %s", config_filename); | |
1217 | goto out; | |
1218 | } | |
1219 | ||
1220 | if (!(config_file = fopen(config_filename, "rb"))) { | |
1221 | /* no config file means nothing to rename, no error */ | |
1222 | goto unlock_and_out; | |
1223 | } | |
1224 | ||
1225 | while (fgets(buf, sizeof(buf), config_file)) { | |
1226 | int i; | |
1227 | int length; | |
1228 | for (i = 0; buf[i] && isspace(buf[i]); i++) | |
1229 | ; /* do nothing */ | |
1230 | if (buf[i] == '[') { | |
1231 | /* it's a section */ | |
1232 | if (section_name_match (&buf[i+1], old_name)) { | |
1233 | ret++; | |
1234 | if (new_name == NULL) { | |
1235 | remove = 1; | |
1236 | continue; | |
1237 | } | |
1238 | store.baselen = strlen(new_name); | |
1239 | if (!store_write_section(out_fd, new_name)) { | |
1240 | ret = write_error(lock->filename); | |
1241 | goto out; | |
1242 | } | |
1243 | continue; | |
1244 | } | |
1245 | remove = 0; | |
1246 | } | |
1247 | if (remove) | |
1248 | continue; | |
1249 | length = strlen(buf); | |
1250 | if (write_in_full(out_fd, buf, length) != length) { | |
1251 | ret = write_error(lock->filename); | |
1252 | goto out; | |
1253 | } | |
1254 | } | |
1255 | fclose(config_file); | |
1256 | unlock_and_out: | |
1257 | if (commit_lock_file(lock) < 0) | |
1258 | ret = error("could not commit config file %s", config_filename); | |
1259 | out: | |
1260 | free(config_filename); | |
1261 | return ret; | |
1262 | } | |
1263 | ||
1264 | /* | |
1265 | * Call this to report error for your variable that should not | |
1266 | * get a boolean value (i.e. "[my] var" means "true"). | |
1267 | */ | |
1268 | int config_error_nonbool(const char *var) | |
1269 | { | |
1270 | return error("Missing value for '%s'", var); | |
1271 | } |